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ControlLogix Redundant Power Supply
Troubleshoot the Redundant Power Supplies
The redundant power supplies have a green status indicator for power and an amber status indicator for non-redundancy.
Power
Non-red
The
Status Indicators
table describes how to use the status indicators to troubleshoot your redundant power supplies.
Status Indicators
Power Indicator
Non-red Indicator
Solid green
Off
Solid green
Solid amber
Off
Solid amber
Off
Off
Chassis Adapter Status Indicator
The chassis adapter has a green power status indicator. When the status indicator is solid green, the chassis is receiving power from the redundant
power supplies. If the indicator is off, the chassis is not receiving power from the redundant power supplies. See the
troubleshoot the redundant power supplies.
10
Description
The power supplies are operating properly.
This power supply is operating properly, but is the only power
supply providing power to the chassis adapter.
All possible connections are made, but the power supply is turned
off.
Any of the following conditions can apply:
The supply is turned OFF.
Line voltage is not within the specified range.
All connections are made, but input power is not supplied.
All connections are made, including input power, but the
output cable (1756-CPR2) is not connected.
The power supply is ON but defective.
Rockwell Automation Publication 1756-IN620D-EN-P - October 2018
Take This Action
None
Check the other power supply.
Turn the power supply ON. If the power supply does not turn ON, follow these
steps.
1. Remove the input power from the power supply.
2. Wait 30 seconds.
3. Reconnect the input power.
4. Turn the power supply ON.
If the power supply still does not turn ON, it can require replacement.
Take the corresponding action:
Turn the power supply ON.
Verify that line power is in the specified range. If the indicators remain OFF,
cycle power.
Verify that input power is supplied and turn the power supply ON.
Connect the output cable and turn the power supply ON.
The power supply can require replacement.
Status Indicators
table to
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